Sometimes factory is joined with factory, with farms, fisheries, mines, with transport and distributing agencies, as one gigantic business unit, controlled by a common will.

It is hardly too much to say that the issue as to whether the size of the typical business unit will continue to become larger and larger, or whether it has already overshot the point of maximum efficiency will turn largely upon the capacity of accountancy to supply large and complex undertakings with more accurate instruments of detailed financial measurement. §4.

Upon the issue whether a growth in the size of the business unit is likely to diminish risk, the law of averages thus cuts both ways.

Another effect of the growing size of business units is to give the workers less personal acquaintance with each other.